While Taking Care of My Shut-In Little Sister, I Somehow Ended Up Ejaculating Inside a Beautiful Girl - Chapter 16: If We Crossed That Line, It Felt Like We Couldn’t Stop

Chapter 16: If We Crossed That Line, It Felt Like We Couldn’t Stop

“…? ♥ What’s up? ♥”

“Nothing.”

I glanced at Yuu’s profile, but she caught me right away, so I faced forward.

Unlike usual, the two of us weren’t holding hands.

Carrying a quiet tension and, oddly, a sense of comfort—a strange contradiction—I walked through the city with Yuu.

Without buying umbrellas, we wandered the bustling streets and chose the entrance of a certain hotel as our shelter from the rain.

It had a slightly old-fashioned vibe, with a pretty plain exterior.

Still, the interior was surprisingly clean, clearly well-maintained. Not luxurious, but not shabby either. Just… normal, or maybe neatly kept.

This place was a business hotel converted from an old love hotel.

“Apparently, this building used to be a love hotel. It went under, so they turned it into a regular business hotel. The rates are cheaper than other places, and it’s quietly popular, or so they say.”

“A f-former love hotel…!? ♥”

I don’t know how reliable online hotel reviews are, but we’d find out soon enough.

After checking in and getting the key, we took the elevator to our room.

The moment we opened the door, Yuu and I were stunned by the sight of a massive double bed.

“W-Wow…!”

“Bigger bed than I expected. And the room’s pretty spacious too…”

You’d think a business hotel would have cramped, no-frills rooms, but since this was originally a love hotel, it was a bit roomier, with traces of its past lingering.

Like the multiple condoms carefully placed on the mini-table by the bed.

“…Oh!”

Yuu must’ve noticed them at the same time as me, letting out a small gasp and stealing a glance at my face.

“What’s up?”

“—N-Nothing! ~~…”

Her face turned bright red as she looked away. So cute, I couldn’t help but laugh.

“—Achoo!”

“Whoa, you okay?”

Yuu sneezed.

“…Oh, oh no…!”

Still facing away, she scrambled to the desk by the wall, grabbed a few tissues, and blew her nose.

“It was just light rain, but your hair got a bit wet. Go take a shower first.”

“Really?”

“Ladies first.”

“…Okay, then I’ll go ahead.”

Yuu agreed hesitantly, but she seemed super tense, moving like a robot toward the bathroom, clutching a bath towel and robe from the room.

“Clothes… Oh, right, we bought some today.”

Yeah, we’d gone shopping for clothes earlier. What we were wearing was slightly damp from the rain, but it was light enough that it wasn’t a big deal. If they didn’t dry by the time we left, we could wear the new clothes. For now, the bathrobes would do.

“Even if it’s a former love hotel, it’s surprisingly normal, just a bit spacious.”

Looking around the room from the bed without Yuu, that’s all I could think. I hadn’t checked out the bathroom she’d gone to yet—what’s it like? Judging by the room’s layout, it’s probably decently big—

‘Eek! What is this!?’

“!!”

Yuu’s scream startled me, and I jumped up from the bed.

“What’s wrong?”

‘—Oh, it’s nothing! I was just surprised, that’s all!’

“…You sure?”

Hearing her lively voice, I sat back down. She sounded shaken but not in trouble.

*

Later, when I took my shower, I figured out why she screamed. It was the silver soap mat in the spacious bathroom.

First time I’d seen one in person. Felt like encountering a foreign culture—kinda refreshing.

*

“You’re not cold, are you?”

“No… I’m fine…”

After my shower, I wiped off the water dripping from my flushed body and headed to the bed.

I sat next to Yuu, who was already there.

Both of us smelled of the same shampoo.

Yuu had dried her hair, tying her long black hair into her usual single braid with a purple hair tie, letting it fall over her left shoulder.

“You sneezed earlier. You okay?”

“Yeah…”

“Gotta make sure you don’t catch a cold.”

“Yeah…”

Yuu was unusually meek, like a borrowed cat.

She stopped brushing her braid, then, as if summoning her courage, twisted toward me and looked up.

Her right shoulder, which had been touching my left, pulled away, and instead, her chest pressed against me.

A soft sensation replaced by an even softer one.

Her body heat felt hotter than before.

“Ren-chan…”

Her dark eyes, gazing up at me from so close, shimmered in the room’s soft light.

I met her gaze, and we locked eyes at point-blank range.

“Am I… dreaming…?”

“It’s not a dream.”

“Mm… ♥”

I placed my hand on her cheek.

Some loose strands of her long hair brushed against my hand.

When I tucked them behind her ear, she let out a ticklish giggle.

“Today, we’re ending this relationship.”

“Yeah ♥”

Yuu looked up at me, her expression a mix of longing and dreamy bliss.

Her soft skin seemed to radiate heat toward me.

Though we’d dried off, it felt like her whole body was drenched.

Our bodies, wrapped in bathrobes, screamed that we were distinct beings.

Hers, not too thin or too heavy, undeniably feminine with a gentle, girlish silhouette.

Mine, growing more muscular with the years.

We were completely different.

Unmistakably male and female.

Yet the hidden heat between us felt maddeningly similar.

Strangers, connected by shared feelings.

Male and female.

“Yuu…”

“Ren-chan… come here… ♥”

Her eyes closed, she invited me with a sweet voice.

The perfect curve of her chest formed a valley that caught my gaze below.

Her healthy skin tone radiated a faint heat.

A droplet—sweat or leftover water—traced a path down into that valley.

Her bathrobe was slightly open, her breasts—not too big, not too small—teasingly close to being exposed.

My eyes took in her neck and below, reluctant to let the sight slip to the edge of my vision. I leaned in, bringing my lips closer to hers, and pressed them together.

“Mmm… chu… ♥”

Yuu let out a faint breath as our lips met.

No matter how close we’d been before, how much we’d touched, I’d never crossed this boundary.

We crossed the line.

“Chu… mm… mmph… ♥”

Our lips pressed together, feeling every sensation, mouths opening to exchange saliva.

At first, our movements were awkward, pecking at each other’s lips. But moment by moment, second by second, we found a rhythm, our breathing synced, and the heat began to build.

It quickly turned into the passionate, intimate kiss of a seasoned couple.

“Mmm… ha… ♥ chu… mmm… mmph… ♥”

Amid the softness, the contact of our mucous membranes conveyed warmth and pleasure.

It wasn’t just this moment.

All day, we’d been building up to this.

Our emotions soared without limit, and the rush of pleasure hit us hard—especially Yuu, who reacted intensely.

Her response fueled me further, urging me to want her even more deeply.

“Mmph!? ♥♥”

Yuu’s eyes widened for a split second, her body trembling.

Then, as if accepting my tongue, she clumsily entwined hers with mine.

“Mmm… mm… ♥ haam… chu… chup… ♥ …ha… ♥ …mmm… lero… mmph… ♥”

The warmth of her tongue, its softness, the obscene tickling of mucous membranes.

Soon, her tongue invaded my mouth, and we violated each other’s membranes with fervor.

A ravenous entanglement, savoring each other’s flesh to the fullest.

Not one-sided—both of us craving the other, our lust and emotions amplifying each other.

“…Ha… ha… ♥ —mchu ♥ …chu… mmph… ♥ …chu… chup… ♥”

Her breaths between kisses were already sweet, like moans of ecstasy.

“Mchu… ♥ …mm, mm, ha… ♥ Kiss… ♥ Kiss… ♥ Mchu… ♥ Ha… ♥ This… kissing… it’s amazing… ♥♥”

At first, we kissed holding our breath, like it was textbook.

But at some point, without either of us noticing, it became wild—breathing heavily, devouring each other without restraint.

“I… Ren, we… ♥ really kissed… ah… ♥♥♥”

Yuu went limp, as if all the strength had drained from her body.

“Whoa.”

I quickly caught her, and as she looked up at me in my arms, she wore a goofy, blissful smile.

“You okay…?”

“Ehehe… ♥”

“Hey.”

“Ehehehe… ♥♥”

Yuu grinned like she’d taken some dangerous drug, looking a little unhinged.

Is she… high on kissing?

Her adorable yet worrying state made me gently stroke her cheek.

“Hey… Yuu.”

“Ren-chan… ♥”

She placed her hand over mine on her cheek.

The heat from her hand, her high body temperature.

Her expression, her breaths, showed her rationality was melting away.

That heated kiss had completely undone her.

“Ren-chaaan ♥”

Her arms reached past my shoulders, wrapping around the back of my neck.

At the same time, she fidgeted, lifting her legs—previously dangling off the bed—onto it.

Her legs crossed over my thighs.

As I held her, I felt her weight and warmth on my knees and stomach.

We were embracing each other—no, wait, it’s a bit different.

This was a princess carry.

“Ren-chan ♥ Ren-chan ♥ Ren-chan… ♥♥”

With an ecstatic expression, her smile couldn’t get any looser, her eyes practically sparkling with heart-shaped pupils, her rationality gone.

“This is nice.”

“Yeah ♥ It’s all… mushy… ♥”

“—!”

Her words were a bit off, making me tilt my head at our shaky conversational exchange. Realizing what she meant hit me like a mistake I couldn’t take back.

My gaze was drawn to her crotch.

I couldn’t see it directly, but I couldn’t stop staring at the healthy skin peeking from the hem of her bathrobe.

Her thighs, faintly reflecting the room’s light. My eyes lingered at their base.

“…Aha ♥♥ Ren-chan, you… ♥♥♥”

Yuu spread her legs slightly, then closed them, repeating the motion.

Her bathrobe’s hem opened and closed with each movement—but from my angle, holding her sideways, I couldn’t see inside.

The heat rising from there, or maybe a scent—no, that’s impossible—but I felt dizzy, blood rushing to my groin.

I could almost feel her warmth dripping onto me.

“Ehehe ♥♥♥”

Maybe she sensed the obvious change in my body, or maybe not. Either way, Yuu suddenly moved with purpose, shakily kneeling on the bed.

Escaping my princess carry while still clinging to my neck, she did something unexpected.

“Nn, there.”

She climbed over me, sitting on the bed, and lowered herself to face me.

The face-to-face sitting position.

“—Mmph!?”

“Chuu~ ♥”

She kissed me head-on.

Her boldness caught me off guard, slowing my reaction.

“Mmm… chu… ♥ mm… mmph… ♥♥”

The intense kissing resumed, as if picking up where we left off.

But it didn’t stop there.

“—Mm!? ♥♥”

Under Yuu’s hips, sitting face-to-face on my lap.

My penis, pinned beneath her, was painfully hard, straining upward.

It trembled, trying to push her off, sending intermittent jolts to her crotch.

“—Ah! ♥ W-Wait… ♥♥”

“…Sorry, Yuu. This is too much.”

My limit.

My rationality, my groin.

They were surrendering to instinct.

“What—Eek! ♥♥♥”

I lifted Yuu and gently laid her on the bed.

—No, this is too far.

My rationality sounded the alarm.

“…Yuu. We can’t go further. I can’t hold back.”

But my brain wasn’t processing reason properly.

I was losing it too.

I couldn’t even understand why I was so out of control, why my rationality was failing.

“It’s okay! ♥ Come on! ♥ Hurry! ♥♥”

I wanted to make her mine.

To become one with her.

I was dizzy.

Was this intoxication, or something like it? As I savored the sensation—

“Come… ♥ Come on! ♥♥♥”

I swallowed hard, leaned over her as she lay on the bed, and knelt over her body.

“I’m… probably ready… ♥♥♥”

She watched my hand reach toward her with eyes full of expectation.